当心文件 I/O 有错误

当心文件 I/O 有错误。

 #include <iostream>
 #include <iostream>
 #include <numeric>
 #include <vector>
 #include <list>
 #include <set>

 /* run this program using the console pauser or add your own getch, system("pause") or input loop */

 using namespace std;

 //利用类模板生成类实例
 typedef vector < int > IntArray;
 typedef list <int> LISTINT;
 typedef set<int> SET_INT;
 int add(int a, int b) {
    return a+b;
 }
 //在main()函数中测试accumulate算法
 int main(int argc, char** argv) {
 {
 //--------------------------------------------
 //    accumulate算法对于普通数组的计算
 //---------------------------------------------
     int x[]={,,,,};

     cout<<"x[]:";
     for (int i=;i<;i++)
         cout<<x[i]<<" ";
     cout<<endl;
     cout<<"accumulate(x,x+5,0)=";
     cout<<accumulate(x,x+,)<<endl;
     int val=;
     cout<<"val="<<val<<endl;
     cout<<"accumulate(x,x+5,val)=";
     cout<<accumulate(x,x+,val)<<endl;
 //--------------------------------------------
 //    accumulate算法对于vector容器的计算
 //---------------------------------------------
     //声明intvector容器和迭代器ii
     IntArray intvector;
     IntArray::iterator ii;

     //向intvector容器中插入元素
     for (int i=; i<=; i++) {
         intvector.push_back(i);
     };

     //显示intvector容器中的元素值和累加结果
     cout << "intvector: "<<endl;
     for (ii=intvector.begin();ii !=intvector.end();++ii)
         cout<<(*ii)<<" ";
     cout<<endl;
     cout<<"accumulate(intvector.begin(),intvector.end(),0)=";
     cout<<accumulate(intvector.begin(),intvector.end(),)<<endl;
 //--------------------------------------------
 //    accumulate算法对于list容器的计算
 //---------------------------------------------
     //声明list容器对象和迭代器
     LISTINT::iterator iL;
     LISTINT list1; 

     //向list1容器对象中插入元素并显示
     list1.push_front();
     list1.push_front();
     list1.push_front();
     list1.push_back();
     list1.push_back();

     //显示list1容器的元素值和累加结果
     cout << "list1: "<<endl;
     for (iL=list1.begin();iL !=list1.end();++iL)
         cout<<(*iL)<<" ";
     cout<<endl;
     cout<<"accumulate(list1.begin(),list1.end(),0)=";
     cout<<accumulate(list1.begin(),list1.end(),)<<endl;
 //--------------------------------------------
 //    accumulate算法对于set容器的计算
 //---------------------------------------------
     //声明set容器对象和迭代器
     SET_INT set1;
     SET_INT::iterator si;

     //向set1容器中插入元素
     set1.insert();
     set1.insert();
     set1.insert();
     set1.insert();
     set1.insert();

     //显示set1容器的元素值和累加结果
     cout <<"set1: "<<endl;
     for (si=set1.begin();si !=set1.end();++si)
         cout<<(*si)<<" ";
     cout<<endl;
     cout<<"accumulate(set1.begin(),set1.end(),0)=";
     cout<<accumulate(set1.begin(),set1.end(),)<<endl;
     cout<<"accumulate(set1.begin(),set1.end(),100)=";
     cout<<accumulate(set1.begin(),set1.end(),)<<endl;
     return ;
 }
 }